What mangos types do you get when you ask for "Mamouang"? / Street Sellers

When I ask for "ma moo hang" to the street mobile sellers, I get a yellow soft mango, a little bit acid. It is still hard even though I said soft. Because it's crunchy/crisp.

But sometimes it's different especially during different seasons. This month (November) they are yellow and a mix of soft and hard. Just a tad acidic. I think the outside is green and not yellow, only the inside is yellow?
How to know what is what?

Also, there is always the choice of having a special mango that has a special fluo color. I heard it's because they were soaked into something? I'm not a fan especially because if it's not that good for health then I don't want it/eat..

The goal is to find what is good for health.

Because for soimething not good for health, I already have what is needed. So I don't want to force myself to eat fruits if they are actually not good for health.

Thanks  for your help